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 #include &quot;interfaces.h&quot;
 #include &quot;plugindialog.h&quot;

 #include &lt;QPluginLoader&gt;
 #include &lt;QStringList&gt;
 #include &lt;QDir&gt;

 #include &lt;QLabel&gt;
 #include &lt;QGridLayout&gt;
 #include &lt;QPushButton&gt;
 #include &lt;QTreeWidget&gt;
 #include &lt;QTreeWidgetItem&gt;
 #include &lt;QHeaderView&gt;

 PluginDialog::PluginDialog(const QString &amp;path, const QStringList &amp;fileNames,
                            QWidget *parent) :
     QDialog(parent),
     label(new QLabel),
     treeWidget(new QTreeWidget),
     okButton(new QPushButton(tr(&quot;OK&quot;)))
 {
     treeWidget-&gt;setAlternatingRowColors(false);
     treeWidget-&gt;setSelectionMode(QAbstractItemView::NoSelection);
     treeWidget-&gt;setColumnCount(1);
     treeWidget-&gt;header()-&gt;hide();

     okButton-&gt;setDefault(true);

     connect(okButton, SIGNAL(clicked()), this, SLOT(close()));

     QGridLayout *mainLayout = new QGridLayout;
     mainLayout-&gt;setColumnStretch(0, 1);
     mainLayout-&gt;setColumnStretch(2, 1);
     mainLayout-&gt;addWidget(label, 0, 0, 1, 3);
     mainLayout-&gt;addWidget(treeWidget, 1, 0, 1, 3);
     mainLayout-&gt;addWidget(okButton, 2, 1);
     setLayout(mainLayout);

     interfaceIcon.addPixmap(style()-&gt;standardPixmap(QStyle::SP_DirOpenIcon),
                             QIcon::Normal, QIcon::On);
     interfaceIcon.addPixmap(style()-&gt;standardPixmap(QStyle::SP_DirClosedIcon),
                             QIcon::Normal, QIcon::Off);
     featureIcon.addPixmap(style()-&gt;standardPixmap(QStyle::SP_FileIcon));

     setWindowTitle(tr(&quot;Plugin Information&quot;));
     findPlugins(path, fileNames);
 }

 void PluginDialog::findPlugins(const QString &amp;path,
                                const QStringList &amp;fileNames)
 {
     label-&gt;setText(tr(&quot;Plug &amp; Paint found the following plugins\n&quot;
                       &quot;(looked in %1):&quot;)
                    .arg(QDir::toNativeSeparators(path)));

     const QDir dir(path);

     foreach (QObject *plugin, QPluginLoader::staticInstances())
         populateTreeWidget(plugin, tr(&quot;%1 (Static Plugin)&quot;)
                                    .arg(plugin-&gt;metaObject()-&gt;className()));

     foreach (QString fileName, fileNames) {
         QPluginLoader loader(dir.absoluteFilePath(fileName));
         QObject *plugin = loader.instance();
         if (plugin)
             populateTreeWidget(plugin, fileName);
     }
 }

 void PluginDialog::populateTreeWidget(QObject *plugin, const QString &amp;text)
 {
     QTreeWidgetItem *pluginItem = new QTreeWidgetItem(treeWidget);
     pluginItem-&gt;setText(0, text);
     treeWidget-&gt;setItemExpanded(pluginItem, true);

     QFont boldFont = pluginItem-&gt;font(0);
     boldFont.setBold(true);
     pluginItem-&gt;setFont(0, boldFont);

     if (plugin) {
         BrushInterface *iBrush = qobject_cast&lt;BrushInterface *&gt;(plugin);
         if (iBrush)
             addItems(pluginItem, &quot;BrushInterface&quot;, iBrush-&gt;brushes());

         ShapeInterface *iShape = qobject_cast&lt;ShapeInterface *&gt;(plugin);
         if (iShape)
             addItems(pluginItem, &quot;ShapeInterface&quot;, iShape-&gt;shapes());

         FilterInterface *iFilter =
                 qobject_cast&lt;FilterInterface *&gt;(plugin);
         if (iFilter)
             addItems(pluginItem, &quot;FilterInterface&quot;, iFilter-&gt;filters());
     }
 }

 void PluginDialog::addItems(QTreeWidgetItem *pluginItem,
                             const char *interfaceName,
                             const QStringList &amp;features)
 {
     QTreeWidgetItem *interfaceItem = new QTreeWidgetItem(pluginItem);
     interfaceItem-&gt;setText(0, interfaceName);
     interfaceItem-&gt;setIcon(0, interfaceIcon);

     foreach (QString feature, features) {
         if (feature.endsWith(&quot;...&quot;))
             feature.chop(3);
         QTreeWidgetItem *featureItem = new QTreeWidgetItem(interfaceItem);
         featureItem-&gt;setText(0, feature);
         featureItem-&gt;setIcon(0, featureIcon);
     }
 }</pre>
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